Dressing grinding wheels and the like



Oct. 15, 1968 w. E. PASOWICZ DRESSING GRINDING WHEELS AND THE LIKE FiledDec. 13, 1966 Inventor Fig.2;

Wolf rE.Posovticz,

United States Patent 3,405,702 DRESSING GRINDING WHEELS AND THE LIKEWalter E. Pasowicz, 2342 l Kenneth Ave., Chicago, Ill. 60639 Filed Dec.13, 1966, Ser. No. 601,496 6 Claims. (Cl. 125-11) ABSTRACT OF THEDISCLOSURE A tool intended particularly for the use of machinists andothers engaged in fine and accurate grinding wheel operations; enablingthe user of such tool to produce desired engagement of the dressing toolwith the work body, from numerous angles of the tool with respect tosuch work body. The tool is provided with several end connected linksfor support of a tool carrying element, by which such tool carryingelement may be brought to a wide range of positions with respect to thework body; provision being made for locking the parts in adjustedposition.

This application relates to improvements in dressing grinding wheels,and the like. The structures herein disclosed are of the general formand type of those disclosed in my copending application for LettersPatent of the United States on improvements in dressing grinding wheels,and the like, Ser. No. 395,427, filed Sept. 10, 1964, nOW Patent No.3,301,247, and the presently disclosed structures comprise improve-mentsor variations on the structures disclosed in that earlier application.One such improvement comprises the provision of means whereby thecarrier element which supports the dressing unit, may be attached to thelink which supports such carrier element, in more than one direction orrelation of such support by such link, to thereby render the structuremore versatile, in the sense that the dressing unit may thereby bepresented to the wheel being dressed from either a vertical orupstanding position, as shown in said earlier application, or from asidewise extending position, thus facilitating the dressing of thewheels or other bodies from either an tip-reaching position, or from asidewise approach position; the arrangement herein disclosed being onewhich also makes it possible to vary the angle of contact of thegrinding tool with the work body through a wide range of adjustments,including an adjustment under which the grinding tool projects directlytowards the plane of rotation of the wheel being dressed (or other workbody), or projects in direction at a wide range of variations of theangle with respect to the plane in which the wheel being dressedrotates. Reference to such earlier disclosed structure will show that,although the dressing element therein supported may be rocked through awide range of angles of projection towards the work body, such rockingsare produced about a horizontal axis, and with upward projection of thecutting tool at a desired angle to its engagement with the surface ofthe work body. The structures herein disclosed are constituted foroperation according to such just explained conditions; but additionally,the presently disclosed structures are such that the rocking adjustmentsof the cutting tool may also, alternatively, be produced about avertically extending axis, lying in a vertical plane, instead of lyingin a horizontal plane. Thus the versatility of the operations which maybe performed by the presently improved structures is substantiallyincreased.

A further feature herein disclosed, relates to improvements whereby thedressing unit may be extended out horizontally from the plane whichincludes the supporting links so that the cutting or dressing operationsmay be performed on surfaces'not readily accessible when such a lateralextension is not produced. The arrangement is such that such lateralprojection may be provided in either direction from the plane of thesupporting links, by a simple reversing operation during attachment ofthe parts.

A further improvement resides in the provision of improved means toadjust the angle of the first or primary link, with respect to thehorizontal base, thereby adjusting the elevation of the carrier elementabove the plane of support. This improvement simplifies the structures,and otherwise improves them as will hereinafter appear.

A further feature relates to the provision of means whereby the severallinks may be very securely locked in any adjusted position or angle withrespect to each other. Thereby danger of slippage during a dressing orgrinding operation is materially reduced, it being noted that such aslippage might cause material damage either to the work body or to thedressing unit, due to sudden and serious change in the engagement of thetool with the work body.

Other objects and uses of the invention will appear from a detaileddescription of the same, which consists in the features of constructionand combinations of parts hereinafter described and claimed.

In the drawing:

FIGURE 1 shows a side elevation of a structure embodying theimprovements of the present application, the carrier element being shownin its attachment to the central link or arm, in manner to support thecutting tool facing upwardly;

FIGURE 2 shows a horizontal view of the lower portion of the structureshown in FIGURE 1, only the lower link being shown;

FIGURE 3 shows a fragmentary side view of a portion of the structure,the carrier element being rotated on an axis extending lengthwise ofsuch unit, through an angle of ninety degrees, to cause the cutting toolto ex tend laterally instead of upwardly, as shown in the prior showingof FIGURE 1, it being noted that in FIGURE 3 such extension of thecutting tool is towards the observer;

FIGURE 4 shows another fragmentary side view of another modification,wherein there is provided a lateral extension element connected to thecarrier, to receive and hold the cutting tool in laterally displacedposition for more convenient conduct of various operations;

FIGURE 5 shows a cross-sectional view taken on the line 55 of FIGURE 4,looking in the direction of the arrows; and

FIGURE 6 shows a .face view of an insert element constituted forengagement with a companion element, both elements being set into theproximate end portions of two pivotally connected links, to lock suchlinks securely against angular displacement with respect to each other;such insert elements being shown by dotted lines in FIGURE 2.

Referring to the drawing, the unit includes the base block 10, to beseated on a smooth planar surface. Such block may be formed ofmagnetizable material, for magnetic holding to the surface on which itis seated. The block 11 is seated in a lateral recess of such block 10,and firmly secured thereto, as by the screws 12. The primary arm or link13 is pivotally connected to such block 11, as by the screw 14. In orderto retain the link 13 securely against angular shift from its intendedadjustment I have provided the following structures:

The plate 15, having the arcuate lateral extension 16, is seated againstthe rear face of the block 11, with such lateral projection extendingleftwardly as shown. Such lateral extension is provided with a series ofopenings 17, spaced apart at comparatively small spacings, such as tendegrees; and the arm 13 is provided with a single opening 18, located atthe same radius from the pivotal connection, as the openings 17.Accordingly a pin 19 may be set through any one of the openings 17 whichhas been registered with such single opening 18, to lock the arm 13 infixed angular position with respect to the plate 15. Such plate 15 isrotatably mounted on the pivotal connection 14, so that it may be rockedthrough a smfll angle, to carry the projection 16 up or down acorrespondingly small amount, carrying with it the arm 13 which has beenpinned to such projection 16. Such vernier angular adjustment of theangular position of the arm 13 is produced as follows:

A lug 20 projects forwardly from the lower portion of the lateralprojection 16, and a pin 21 extends forwardly from such lug 20. A stud22 has its lower end threaded into the base block 10 so that by rotationof such stud it will be raised or lowered slightly. Such stud 22 isprovided with the encircling groove 23 which receives the pin 21 as wellshown in FIGURE 2 with a nice fit. Accordingly, when the arm 13 has beenrocked to a position approximate to its desired adjustment, and with theopening 18 registered with one of the openings 17, with the pin 19 setinto place between such registering holes, vernier adjustments of theangle of the arm, up or down, may be produced by slight rotations of thestud 22 in the proper direction. It is noted that by use of the vernieradjustment thus afforded, the lower end of the stud 22 is supported bythe threading engagement with the base block. Accordingly, when theentire unit is raised by grasping the arm 13 or some other convenientelement, the base block will also be raised, without change of theangular adjusted position which has been produced by use of such stud22. Such arrangement is to be distinguished from an arrangement in whichthe lower end of the stud seats against the surface of the base block,or a hard insert, since in such latter structure there is no connectionbetween the parts to forbid lag of the base block behind the risingmovement of the arm, other than the tightened screw 14 and/or insertsbetween the arm and the base block, presently to be described. However,on occasion it may be desired to make angular adjustment between thebase block and such arm 13, and to lift the device as thus adjusted,prior to tightening such screw. The structures above described willenable such manipulations as lifting the device after angularadjustment, and prior to tightening the screw 14, without disturbing theaccuracy of the angular adjustment previously made.

The link 24 has its lower end pivotally connected to the outer end ofthe primary link 13 by the screw 25, which can be tightened sufficientlyto hold the two links firmly in adjusted angular position with respectto each other. The carrier unit 26 has one end pivotally connected tothe outer end of the link 24 by the screw 27 which can be tightenedsufficiently to retain such two links in adjusted position, angularly,with respect to each other. If desired, toothed inserts such as thoseshown in FIGURE 6, and in position in FIGURE 2, may be includes in thepivotal connections at the screws and 27, to ensure against shift ofangularity between the link 13 and the carrier unit 26, respectively.

The carrier unit 26 may be of the form shown in my copendingapplication, Ser. No. 395,427, already referred to. Such carrier unitincludes the link bar 28, having the lengthwise extending track rod 29supported by the end lugs 30 and 31, with the block 32 freely mounted onsuch track rod for endwise movement on such rod, a set screw 33 beingprovided in the block for engagement against the track rod to lock theblock in adjusted position along such rod. Such block 32 is providedwith the projecting lug 34 to which the cutting tool 35 is connected.Such connection of the cutting tool to the lug includes a stem 36extended through the lug 34 and into a block 37 directly connected tothe cutting tool element, the stem being threaded into the cutting toolelement so that by loosening such stem the tool may be rocked intovarious directions; but all such rocking movements thus produced arewithin a vertical plane, namely, at right-angles to the surface on whichthe base block 10 is set. Accordingly, with the structure as thus fardescribed, adjustments of the cutting tool occur within such verticalplane, and I have hereinbefore referred to such adjustments as beingwith the tool in a vertical direction.

The structure of linkage, 13, 24, and 26, so far as described, issubstantially the same as disclosed in my said copending application,Ser. No. 395,427, with the exception of various elements concerning theadjustment of the angularity of the primary link 13, and related parts.

The link or bar 24 is provided with the opening 38 extending throughsuch bar to enable connection of the bar to the link 24 face-to-face, asshown in FIGURE 1. This connection enables operations to be performedwith the cutting tool in the vertical plane, as already explained.Additionally, I have provided the opening 39 through the body of suchbar 28, at right-angles to the opening 38, and of size to accommodatethe screw 27. Accordingly, when desired, such bar 28 may be connected tothe link 24 with the bar 28 rotated ninety degrees on its length, asshown in FIGURE 3. It is noted that such connection to the link 24 maybe with the bar 28 rotated in direction to bring the lug 34 facing theobserver as shown in FIG- URE 3, or the bar 28 may be rotated in theopposite direction, under which condition the lug 34 would face awayfrom the observer. In the illustrated case the cutting tool faces theobserver as shown in FIGURE 3; in the latter case, the cutting toolwould face away from the observer; but in each such case rotations ofthe cutter supporting block 37 will produce cutter positions adjustedwithin a plane at right angles to that plane within which the cutteradjustments were possible, when the bar 28 is connected to the link 24in the showing of FIGURE 1. Accordingly, with the parts assembled in themanner shown in FIGURE 3, cutting or dressing operations may beconducted on vertical surfaces, while the base block stands on ahorizontal support as shown in FIGURE 1. Thus the versatility of theunit is substantially increased by the improvement now being described.

Reference has been made to the provision of means, supplemental tofriction between parts, for holding the adjusted elements 13, 24, and26, against shift, once they have been brought into adjusted positions,with respect to each other. Such supplemental means is shown in faceview in FIGURE 6. It comprises a ring 40, having formed in its facenumerous irregularities, such as teeth, which may be matched with theteeth of a like element, so that when the two elements are broughttogether, they are locked into positions. Such ring units are set intorecesses formed in the proximate surface portions of the elements to beheld in adjusted position. Such recesses are shown in FIGURE 2, at 41and 42. It is noted that when such supplemental holding elements as thusdescribed are used, each of the pair must be retained in its recessagainst rotation with respect to the element to which it is connected.Accordingly, to change the angular relation between two of the elementsor links, 13-24, and 24-28, it is necessary to loosen the screw whichextends between such a pair, sutficiently to allow the teeth of the twoelements to be passed over the teeth of their companion elements.Accordingly, changes in angular positions between the links can only bemade by steps, of amount depending on the numbers of teeth provided inthe elements 40. Such structures are satisfactory for adjustmentsbetween the two elements 24 and 28; but since the angular adjustmentbetween the primary link 13 and the base unit 10 is used for producingexact adjustment of the elevation of the cutting or dressing tool abovethe support on which the base 10 stands, provision must be made for asupplemental vernier adjustment of the angle between the primary link 13and the base unit. I have already described an improved form of suchvernier adjustment in this application.

In FIGURE 5 I have shown a further feature of improvement. In thisembodiment the extension element 43 has its inner end secured to the lug34 by the screw 44. The outer end of such element 43 is provided with anopening 45 to receive a screw by which the cutting tool element may besecured to such extension. Such extension element may be of stiffmaterial such as steel, or in some cases, of aluminum or plastic. Withsuch extension element in place the cutting tool will be set laterallysome distance from the body of the structure -24-26- 32 and 34, thusmaking it possible to produce desired grinding or dressing operationsunder conditions which would otherwise prevent setting the base portionof the unit laterally far enough to bring the cutting tool into neededoperative position.

I claim:

1. A self-contained unit for dressing a work body, comprising incombination a base block having a smooth planar mounting surface forsupport on a table-like element, a primary arm pivotally mounted to saidbase block for rocking movement about a first defined axis lying in aplane which intersects the mounting surface of the base block, means tolock the primary arm and the base block together in angularly adjustedposition, a secondary link element pivotally connected to the free endof the primary arm for angular movement with respect to the primary armabout a second defined axis substantially parallel to the first definedaxis, means to lock the secondary link element and the primary arm inangularly adjusted position, a dressing unit carrier, a dressing unitholder, means to support such dressing unit holder on the dressing unitcarrier for endwise movement along said carrier including means tosecure the dressing unit holder in adjusted position on the carrier, anaxis element on the free end of the secondary link element, meansconstituted to pivotally support one end of the carrier on the axiselement of the secondary link element with said carrier in a firstdefined rotated position on the lengthwise extending axis of saidcarrier, or with said carrier in a second defined rotated position onthe lengthwise extending axis of such carrier; together with means tolock the carrier against rotary movement on the axis element of thesecondary link element when the carrier is in either said first definedrotated position on its lengthwise extending axis, or in said seconddefined rotated position on its lengthwise extending axis.

2. A structure as defined in claim 1; wherein the means which isconstituted to pivotally support one end of the carrier to the axiselement of the secondary link element with the carrier in either thefirst defined or the second defined rotated position of the lengthwiseextending axis of the carrier, comprises through bearing openings formedin the end portion of the carrier and extending through the carrier indifferent directions.

3. A structure as defined in claim 2; wherein the through bearingsextend through the end portion of the carrier in directionscorresponding to rotated positions of the carrier on its lengthwiseextending axis, which rotated positions are at substantiallyright-angles to each other.

4. A self-contained unit for dressing a work body, comprising incombination a base block having a smooth planar mounting surface ofsupport on a table-like element, a primary arm pivotally mounted to saidbase block for rocking movement about a first defined axis lying in aplane which intersects the mounting surface of the base block, means tolock the primary aim and the base block together in angularly adjustedposition, a secondary link element pivotally connected to the free endof the primary arm for angular movement with respect to the primary armabout a second defined axis substantially parallel to the first definedaxis, means to lock the secondary link element and the primary arm inangularly adjusted position, a dressing unit carrier, a dressing unitholder, means to support such dressing unit holder on the dressing unitcarrier for endwise movement along said carrier including means tosecure the dressing unit holder in adjusted position on the carrier, anda pivotal connection between the dressing unit carrier and the secondarylink, and means to lock said carrier and said secondary link in adjustedposition; wherein the means to lock the primary arm in adjusted positionwith respect to the base block, comprising; a segment secured to theprimary arm and including a plurality of openings arranged at equalradii from the pivotal connection between the base block and the primaryarm, an opening in the primary arm at the same radius from such pivotalconnection between the primary arm and the base block, as the radii ofthe plurality of openings in the segment, a stud extending between oneof the plurality of openings in the segment, and the opening of theprimary arm; means to adjust the segment angularly with respect to thebase block, comprising a stem extending adjacent to a portion of thesegment and threaded into the base block for vertical adjustment withrespect to such base block, an encircling groove in said stem, and alaterally extending stud on the segment, extending into said groove ofthe stud; together with means to lock the segment and primary arm inadjusted angular position with respect to the base block.

5. A self-contained unit for dressing a work body, comprising incombination a base block having a smooth planar mounting surface forsupport on a table-like element, a primary arm pivotally mounted to saidbase block for rocking movement about a first defined axis lying in aplane which intersects the mounting surface of the base block, means tolock the primary arm and the base block together in angularly adjustedposition, a secondary link element pivotally connected to the free endof the primary arm for angular movement with respect to the primary armabout a second defined axis substantially parallel to the first definedaxis, means to lock the secondary link element and the primary arm inangularly adjusted position, a dressing unit carrier, a dressing unitholder, means to support said dressing unit holder on the dressing unitcarrier for endwise movement along said carrier, including means tosecure the dressing unit holder in adjusted position on the carrier,means to lock the dressing unit carrier and the secondary link elementin adjusted position, an extension unit constituted for attachment tothe dressing unit holder for lateral extension from the dressing unitholder, means to removably connect such extension unit to the dressingunit holder, and a dressing unit in connection with such extension unit,and means to removably connect the dressing unit to said extension unit.

6. A structure as defined in claim 5; wherein said extension unitcomprises a body of plastic.

References Cited UNITED STATES PATENTS 2,402,945 7/1946 Brocker 1l2,425,453 8/ 1947 Bavasi 125--l1 2,458,768 l/ 1949 Daily 125-113,324,843 6/1967 Koch 12511 OTHELL M. SIMPSON, Primary Examiner.

